2004 Fiscal Year Final Research Report Summary
Development of manipulation technique of metal nanoparticles for plasmonics
| Project/Area Number |
15310097
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanomaterials/Nanobioscience
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
MIYAZAKI Hideki National Institute for Materials Science, Materials Engineering Laboratory, Senior Researcher, 材料研究所, 主幹研究員 (10262114)
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| Project Period (FY) |
2003 – 2004
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| Keywords | micromanipulation / scanning electron microscope / plasmon |
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| Research Abstract |
The aim of this project was to establish a technique to fabricate plasmon resonance structures by moving metallic nanoparticles by use of micromanipulation in a scanning electron microscope.
In the first year, the feasibility of plasmon resonance structures by manipulation technique was confirmed. Silver microspheres of 100 nm diameter were arranged into dieters with quartz probes with a tip radius of 20-30 nm. These dimers showed red scattering peaks for long-axis polarization. These peaks were identified as anti-symmetric bonding mode of dipolar scattering resonance modes excited in individual spheres. However, we encountered a serious problem that the resonance properties are affected by the SEM observation. This is caused by the deposition of contamination materials by electron beam irradiation, which forced us to change the original research plan.
On the other hand, we succeeded in discovering new types of plasmon resonance structures which do not require micromanipulation technique
… More
s to obtain nanometric gap, as a result of systematic theoretical calculation. Therefore, in the second year, we focused on establishing the designing method of the new structures, and investigate their plasmon resonance properties. The new findings was that the plasmon resonance in closely neighboring metallic nanoparticles is regarded as the Fabry-Perot resonance of two-dimensional lightwave propagating in metal-clad/dielectric-core waveguides by the reflection at the open ends. In short, the important point is the realization of metal-clad waveguide with a finite cavity length rather than the mechanical arrangement of particles with a nanometric gap by use of micromanipulation technique. Gold/silica(thickness D=1.7-56nm)/gold multilayers were deposited on fused silica substrates, and at their edges rectangular cavity resonators of 3-micrometer width and L-nanometer length (L=55-495nm) were fabricated by removing their circumferential areas by ion beam milling. As has been predicted by theoretical calculation, the blue shifting of reflection dips was observed as the cavity length decreases. Less
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Research Products
(15 results)
